Polarizing plate and optical display apparatus comprising same
US12360303B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2020 |
| Grant date | Jul 15, 2025 |
| Priority date | — |
| Expiry date | Apr 11, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/3083
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A polarizing plate and an optical display apparatus including the same. The polarizing plate includes: a polarizer; a first retardation layer; and a second retardation layer, the first retardation layer and the second retardation layer being sequentially laminated on a lower surface of the polarizer, wherein the first retardation layer has a short wavelength dispersion of about 1 to about 1.03, a long wavelength dispersion of about 0.98 to about 1, and an in-plane retardation of about 220 nm to about 270 nm at a wavelength of about 550 nm, the second retardation layer has a short wavelength dispersion of about 1 to about 1.1, a long wavelength dispersion of about 0.96 to about 1, and an in-plane retardation of about 80 nm to about 130 nm at a wavelength of about 550 nm, and a ratio (Rth/d) of out-of-plane retardation (Rth, unit:nm) of the second retardation layer at a wavelength of about 550 nm to thickness (d, unit:μm) of the second retardation layer ranges from about −33 nm/μm to about −15 nm/μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.